A British woman who was a key recruiting figure for Isis and who became a notorious hate figure in her home country has reportedly been killed by a missile strike by American forces on the Iraq/Syria border.
The former punk rocker from Kent fled to Syria with her son in 2013 and became a leading recruitment officer for Islamic State.
Pentagon spokesman Maj Adrian Rankine-Galloway said: "I do not have any information that would substantiate that report but that could change and we are looking into this".
News of Jones' death, though, hasn't been disclosed due to concern that her 12-year-old son also died in the strike, The Guardian report said.
Britain on Thursday refused to confirm reports that a USA drone had killed a middle-aged British mother, also known as the "white widow,", who had joined Islamic State jihadists in Syria.
Asked about reports Jones' son was killed in the strike, Maj Gen Chapman added: "It is a hard one because under the UN Charters he is under the age of what we would classify as a soldier".
Mr Fallon also stressed that IS was preparing and inspiring terror attacks in the UK. Later married a computer hacker Gonad Hussein, who was killed in an attack by a drone in 2015.
Jones is among many suspected IS operatives on a United Nations sanctions list, which includes a travel ban and a freeze on her assets.
Born in the Greenwich area of London, she posted extremist comments online such as: "You Christians all need beheading with a nice blunt knife and stuck on the railings at Raqqa".
Sally Jones appears in a selfie before she left for Syria, and in a burqa with a weapon.
Major Gen Chip Chapman, the former head of counter-terrorism at the Ministry of Defence, told the Press Association that she would have been a "significant" target due to her marriage to Hussain and role as a recruiter.